<!DOCTYPE html>
<html>
<head>
  <title>Video Speed Controller</title>
  <style>
    body {
      width: 200px;
      text-align: center;
    }
    button {
      margin: 10px;
      padding: 10px;
    }
  </style>
</head>
<body>
  <h1>Video Speed</h1>
  <button id="decrease">-</button>
  <span id="speed">1x</span>
  <button id="increase">+</button>
  <script src="popup.js"></script>
</body>
</html>